* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    text-decoration: none;
}

.box {
    width: 400px;
    margin: auto;
}

.header {
    width: 100%;
    height: 125px;
    background-color: #181818;
    /* 固定定位 */
    position: fixed;
    transition: all 0.5s;
    /* 平滑过渡动画 */
}

.headertop {
    width: 100%;
    height: 64px;
    display: flex;
    justify-content: space-between;


}

.topleft {
    width: 27px;
    height: 27px;
    background-color: black;
}

.logo {
    width: 120px;
    height: 35px;
    margin-top: 10px;
}

.logo img {
    width: 100%;
    height: 100%;
}

.search {
    width: 27px;
    height: 27px;
    margin-top: 15px;
    margin-right: 5px;
}

.search img {
    width: 100%;
    height: 100%;
}

.headerbottom {
    width: 347px;
    margin: auto;
    height: 61px;
    display: flex;
    justify-content: space-between;

}

.headerbottom>div {
    width: 86px;
    height: 100%;
    text-align: center;
    line-height: 51px;
}

.headerbottom>div>a {
    color: #565656;
    position: relative;
}

.headerbottom>div:nth-child(4)>a {
    color: #fff;
}

.headerbottom>div:nth-child(4)>a::after {
    content: '';
    display: block;
    width: 33px;
    height: 2px;
    background-color: #fff;
    position: absolute;
    top: 170%;
    left: 0%;
}

.headerbottom img {
    width: 15px;
    height: 20px;
    padding-top: 5px;
}

/* 展示样式 */
.showbox {
    width: 100%;
}

.show {
    width: 100%;
    height: 545px;
    background-color: #181818;
}

.showimg {
    height: 285px;
    width: 100%;
    overflow: hidden;
}

.showimg img {
    width: 100%;
    height: 100%;
}

.showtype {
    width: 100%;
    height: 20px;
    color: #565656;
    text-align: center;
    margin: 22px 0px 16px;
}

.showh2 {
    width: 346px;
    margin: auto;
    height: 80px;
    color: #d9d9d9;
    font-size: 26px;
    margin: 26px 26px 21px;

}

.showbottom {
    width: 368px;
    margin: auto;

}

.showbottom img {
    width: 14px;
    height: 14px;
}

.showbottom span {
    color: #565656;
    font-size: 14px;
}

.zuozhe {
    margin-left: 99px;
}